Improvement in hot-air furnaces



afee Enwm GLARKS Improvement- ;in Hot-Air Furnaces.

M PATENTED MAY 91 71 114928 Wifi imad I Q "(2@/@ 44 111v enter.

EDWIN OLA or ane-Aston, YPENNSYLVANI A.

Letters Patent No. 114,528, and May '9, Ian.

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I, Enwnt Opsnx, of Lancaster, in; the county of Lancaster and State of Pennsylvania, have invented- [certain Improvements'for Utilizing Waste Heat, and m' the Construction orArraugement of HotrAir Furnacesfor Heating Dwellings, die, of which tbe followiug is a speeificatiohi The primaryobject of my invention is to utilize the heat of the product of combustion usually allowed to escape through the smoke-flue into the chimney, which is cousiderablmand a great waste. One mode to accomplisli, this fis by means of a chambered cold-air flue creasing, causing. the air to rise and fall and come in contact with'a large surface of. the smoke-flue ar-' ranged in three or more series horizontallycrossing each chamber-say, four times-and so as to' deliver therein thus warmed against the fire-box and around threesides of the furnace, constituting a hot-air chamher, from which the air is drawn through the furnace to a second hot air chamber, from whence it is conveyed in the ordinary manner.- The drawing illustrates this arrangement, in which- Figure 1 is a perspective plan view' of the several parts employed. 1 v Figure 2,-the furnace detached, the outer wall or face removed to show the sides K forming the second or final bot air chamber over the fire-box M. Figure 3, a vertical section of the last tier of smokeflues in chamber I. .r t.

Figure 4 shows the capped-projecting ends of the three series of fines, numbered from 2 to 13, within the several cold-air chambers. Y

v Figure 5 shows a section of the iuner'arrangement of the cold-air chambers and hot-air chambers, f urna'ce,

and flues. t

Figure 6 is a. perspective view of'thc three series of smoke-lines shown detached from the several chamhers and furnace. X

Figure 7 represents a cold-air fines.

I Figure 8 is a front view of the same.

FigureQ is a perspective view of the same, exhibiting the pipes and titles as connected together.

The same numbers and letters refer to'the same thing in the drawing.

top view of the pipes and A brief explanation will enable anyone skilled in the art to make and use my invention.

The sides and top, coustituting'the cold-air fines, marked E G F, made of casting or other material, have a partition, s, from the top to near the bottom, and a second partition, 8', from the bottom to nest the top, dividing this trunk into three chambers, I II III.

The cold air enters through a into the first chamber, and circulates around the smoke-fluesto the bot tom opening under partition 3; thence up around the fines in this chamber over the top flue and partition 3 down the third chamber, in like nizumer, to thqbots tom, where it enters under f| l(3.;;'fl(l0l"l', surrounding the firebox and furnace with nn-rnp'en' spacqlcudiug the nlrczuly-warmed n-ir agninst the firc-boxj inidi p three sides of the furnace o 0', being an outer hot-air;

whence it is conducted through ithe chamber, from furnace, in horizontal dues h, into the sccondhoi' 'air chamber over the fiI'OvbOX in frontofihetlufliace closed by the sides K and front A, either of metal-o1"- brick-work, from the top of which second hot-air chamber it passes through openings (1 (1 into one or more .pipes or fines to convey the hen-ted air to the place of designation in the ordinary nmuner. The products of combustion pass out from thearebed top at i into the smoke-pipe nutl'kcdl, and are (aim-led down inside the outer wall or phi-t0 to the lower pipe or-ilue marked 2 in chamber 111 of the cold-air conductor, in which fine it is carried back and up vertically into No. 3; coming forward, rising vertically into the top flue', from whence itcrosses horizontallyin front, overthe top of the partition 3, into the upper fluc, No. 6; descen'ding from flue to flue to No. 9, the-lower flue in charn- N0. 4, goes back again; rises into No, 5,

her II,-when it crosseshorizontally below the partition s into the lower flue, No. l lhsi'u the first chum. her; and rising from fine to flue until' it reaches No. 13, .from whence it is conveyed. into the chimney or flue of the dwelling deprived of on its heat from the action of the-cold air in its windingpussngc through the several chambers. v 1

These flgesd-mvcnntcimropcn cud prdjecting to the outside of the front plate or-wull, where they are providcd with a cap. These caps can be removed, and v the fines are readily cleaned from soot or coal-dust.

This arrangement ofthc smokc flucs presents a large amount of surface in a small space to the action of the cold air before it reaches the furnace or its immediate surroundings, and utilizes the heat otherwise lost. I

Figs. 7, 8, and 9. show how 'I may vary the connec- "'tions of the pipes and flnes without changing the principle of my invention.

16 shows the sides of the cold-air chamber. 17 represents the partitions of the cold-oi r chamber. 18 shows how the direct flue from the furnace may be connected at the top and extend dircctinto a small air-chamber leading into the chimney instead of in an incline. v

19 shows the connecting-pipe from pipe 18, extending down into the side of one of the smallergaszcliuim hers 20.

and overthe fines and over the second partition;

thence down the third air chaniber and around the three, and passing out at the lower opening 3l to the furnace, as indicated by the arrows at fig. 8.

I intend also to use a damper in the direct-pipe 18-- for the. purpose ofcutting oii the direct draught and direct ng it downward through the pipe 19, and thence through the-pipes and fines for the purpose of heating the cold air as it passes through the cold-air chambers on its passage around the flue s to the openingiil.

' I am aware that the products of combustion are deflected from an arched top toeither side and made to pass between dili'erent layers of coldair pipesifand the heat of the furnace, moreorless) until they pass out from the bottom, in which a series of air-tubes above the fire-chamber is claimed incombination with a hotair chamber when placed in front. of the fire-chamber;

as also an arched series of tribes above the fire, and a smokc-flnawhen both sides of the same within the furnace are made entirely or chiefly of series of airtnbes. Such an arrangement I disclaim.-

1 am not awarethat the smoke-fines or pipes were ever so arranged within a series of cold-air chambers as to utilize the otherwise-wasted heat 'efl'ectnally-outside of the furnace or its inclosurcs properly; neither do I know of any arrangement of a furnace in which chamber, then through the furnace into a second hotair chamber, aminged and constructed as herein shown.

I claim- 1 '1. Utilizing the heated production of combustion in its passage from the furnace at 2', through a pipe or flue 1, toan outsidearrangement of fines and cha n- 'be1's, in which the cold air becomes heated in its passage to the furnace,-substant-ially in-the manner spectfled. I

2. A threefold series of fines, No. 2 to 13, as shown, in combination with the chambers I [I III and partitions s s in the cold-air conductor E F G, arranged in thc'n'iann'er and for the purpose specified.

:3. In combination with the series of fines within the ccldeair-conduoting chambers, the arrangement of flue 1,211; i, within the hot-air chamber in front of the furnace H, and the sides K, and open bottom '12, all arranged and operating substantially as and for the purpose described.

l 4. The arrangement of n furnace having a hot-air nor, as shown and described.

' EDWIN GLARK.

Witnesses: W. B, WILEY, 'Jscoc STAUFFEB;

the previously-warmed air is passed into 2t hot-air chamber, 0 0, from whence the heated air is passed fire-box, from whence itis conveyed in the usual man- 

